This Problem Across All Years
The ICCU failed while driving which left me with an undriveable vehicle on the side of the road. The vehicle was towed to the dealership and repaired; however, the part is the same and may fail again.
The ICCU failed while driving which left me with an undriveable vehicle on the side of the road. The vehicle was towed to the dealership and repaired; however, the part is the same and may fail again.
Hyundai is ignoring the fact that many Ioniq 5 have an ICCU defect that happens without warning and can leave you stranded with a bricked car that you can’t drive. They have a software recall for it that I had performed at the dealer. This did not solve the problem because it failed yesterday and I was stranded far from home. They continue to put this same part in the 2025 model. I have a 2024. Brand new cars are having the same problem which requires the whole unit to be replaced with the same unit that can go bad. I know people who it has happened to multiple times. They need to issue a recall that replaces the entire unit with a redesigned one. Not the same exact part. Everyone of these cars is a ticking time bomb that can leave a person stranded.
Hyundai is ignoring the fact that many Ioniq 5 have an ICCU defect that happens without warning and can leave you stranded with a bricked car that you can’t drive. They have a software recall for it that I had performed at the dealer. This did not solve the problem because it failed yesterday and I was stranded far from home. They continue to put this same part in the 2025 model. I have a 2024. Brand new cars are having the same problem which requires the whole unit to be replaced with the same unit that can go bad. I know people who it has happened to multiple times. They need to issue a recall that replaces the entire unit with a redesigned one. Not the same exact part. Everyone of these cars is a ticking time bomb that can leave a person stranded.
The car made a loud popping noise and immediately started displaying electrical system fault errors. The car propulsion stopped within 15 seconds and was not able to be moved after. I was on the freeway and just barely made it over to the side. Car was not able to be towed by a regular tow truck because the electrical system was gone and the car was not able to be shifted into neutral. Jump starting the battery did nothing. Car was sent to the dealer who confirmed that the car sustained an ICCU failure which controls the entire battery electric system. The ICCU had to be replaced. There is already a mandatory recall on the vehicle regarding the ICCU. The recall was to check the status and confirm that the ICCU was working properly and in good condition. I had this recall done BEFORE the ICCU failed, so even though the recall check was performed, the ICCU still failed and put me in a very dangerous situation. The car is 6 months old and has 6200 miles on the odometer.
The car made a loud popping noise and immediately started displaying electrical system fault errors. The car propulsion stopped within 15 seconds and was not able to be moved after. I was on the freeway and just barely made it over to the side. Car was not able to be towed by a regular tow truck because the electrical system was gone and the car was not able to be shifted into neutral. Jump starting the battery did nothing. Car was sent to the dealer who confirmed that the car sustained an ICCU failure which controls the entire battery electric system. The ICCU had to be replaced. There is already a mandatory recall on the vehicle regarding the ICCU. The recall was to check the status and confirm that the ICCU was working properly and in good condition. I had this recall done BEFORE the ICCU failed, so even though the recall check was performed, the ICCU still failed and put me in a very dangerous situation. The car is 6 months old and has 6200 miles on the odometer.
The contact owns a 2024 Hyundai Ioniq 5. The contact stated that while his wife was driving approximately 30 MPH, the vehicle started losing motive power. The contact’s wife depressed the accelerator pedal; however, the vehicle shifted to first or second gear and failed to accelerate above 20 MPH. The contact stated there were no warnings illuminated. The contact stated that his wife pulled into a parking lot and the vehicle lost electrical power and was unable to be restarted. The contact had the vehicle towed to a dealer. The dealer diagnosed the vehicle and informed the contact that the vehicle had had a failure of a part that was on a national back order. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 11,000.
The contact owns a 2024 Hyundai Ioniq 5. The contact stated that while his wife was driving approximately 30 MPH, the vehicle started losing motive power. The contact’s wife depressed the accelerator pedal; however, the vehicle shifted to first or second gear and failed to accelerate above 20 MPH. The contact stated there were no warnings illuminated. The contact stated that his wife pulled into a parking lot and the vehicle lost electrical power and was unable to be restarted. The contact had the vehicle towed to a dealer. The dealer diagnosed the vehicle and informed the contact that the vehicle had had a failure of a part that was on a national back order. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 11,000.
On March 22, 2025, our 2022 Hyundai Ioniq 5 suffered a sudden, complete loss of power while driving at night, after receiving Hyundai’s recall service in January. While driving on city roads, the car displayed “Check Battery” errors despite the main EV battery showing ~75% charge. After stopping, we had AAA install a new 12V battery, which did not resolve the issue. Minutes later, while crossing a Y-shaped highway interchange, the car lost the ability to accelerate, leaving us stranded in a dangerous area. Hyundai Roadside Assistance gave an 89-minute ETA and failed to dispatch a tow capable of transporting our family of three. We were forced to call our insurance to tow the vehicle to safety. The car is now inoperable at a dealership. Hyundai has not followed up. This is a major safety concern — involving either the 12V system or software post-recall — and could impact other vehicles. Photos, screenshots, and documentation are available.
On March 22, 2025, our 2022 Hyundai Ioniq 5 suffered a sudden, complete loss of power while driving at night, after receiving Hyundai’s recall service in January. While driving on city roads, the car displayed “Check Battery” errors despite the main EV battery showing ~75% charge. After stopping, we had AAA install a new 12V battery, which did not resolve the issue. Minutes later, while crossing a Y-shaped highway interchange, the car lost the ability to accelerate, leaving us stranded in a dangerous area. Hyundai Roadside Assistance gave an 89-minute ETA and failed to dispatch a tow capable of transporting our family of three. We were forced to call our insurance to tow the vehicle to safety. The car is now inoperable at a dealership. Hyundai has not followed up. This is a major safety concern — involving either the 12V system or software post-recall — and could impact other vehicles. Photos, screenshots, and documentation are available.
Battery warning appeared. Car stopped after a few minutes. Car can’t be started. Complete list of power. Dealer confirmed it was the ICCU. I had a recall service done in 11.19.2024y last time I got an info about a recall was 1.9.2024
Battery warning appeared. Car stopped after a few minutes. Car can’t be started. Complete list of power. Dealer confirmed it was the ICCU. I had a recall service done in 11.19.2024y last time I got an info about a recall was 1.9.2024
When driving in i-Pedal, which is a "one pedal driving option", sometimes after pausing the car rolls backs several inches. This appears to be a defect with the powetrain, regenerative braking engine, or otherwise. Hyundai's dealership has been advised of this issue; they have escalated this internally. A car in drive forward should never due to electrical or software reasons be told to move backwards -- which is what is happening here.
When driving in i-Pedal, which is a "one pedal driving option", sometimes after pausing the car rolls backs several inches. This appears to be a defect with the powetrain, regenerative braking engine, or otherwise. Hyundai's dealership has been advised of this issue; they have escalated this internally. A car in drive forward should never due to electrical or software reasons be told to move backwards -- which is what is happening here.
The car lost propulsion and displayed Check Vehicle Electric System. Now the it’s sitting at the dealership for over 30 days waiting for parts.
The car lost propulsion and displayed Check Vehicle Electric System. Now the it’s sitting at the dealership for over 30 days waiting for parts.